USB-C to 4 USB-A Hub V1
Introducing my USB-C to 4 USB-A Hub V1, a compact and efficient solution for expanding your device's connectivity. Easily connect multiple USB-A peripherals to a single USB-C port. The USB-C and USB-A high speed differential pairs were done with the help of Flux Automated Impedance Control. #USBCHub #Connectivity #project... show more31 Comments
20 Stars
STM32MP1 Linux Card
This project designs a Linux Single Board Computer using STM32MP157FAC1, featuring DDR memory, a power management IC, USB and SD card interfaces, and essential user controls, aimed at versatile embedded applications.... show more192 Comments
13 Stars
Ouija Board
First in the world hands-free Otherside communication device! You need only the board, spirit or ghost don't need to move the ouija anymore. Symbols will light up from the inside so you will be able to read your messages and spirit or ghost just need to turn on a red bottom entry LED. Two MEMS microphones allow your interlocutor to clearly hear your questions. WiFi connectivity gives you an opportunity to "dial" without a Medium anytime anywhere. And it has Bluetooth as well, because: "Everything is better with Bluetooth"! This board is powered by a single 10440(AAA) LiFePO4 battery that gives you up to 2 hours of seance. Designed by Vasyl Skral... show more32 Comments
5 Stars
Weather Station
This Weather Station Logger project employs the versatile ESP32 microcontroller board, integrated with an SD card slot for data storage. It features a USB interface for easy programming and is efficiently powered by a single 18650 battery, complete with a protection circuit for safe operation. #iot #esp32 #lora #weather #edgecomputing... show more6 Comments
5 Stars
RaspberryPiComputeModule4-NAS-V0
-WiFi 5 -USB-C Powered -Single or Double M.2 drives -Smallest in the world!... show more11 Comments
3 Stars
Single Lead Heart Rate Monitor - AD8232
Use this template if you're planning to get your 1 to 2-layer board manufactured in JLCPCB. It has the via min/max and trace width constraints already baked as global rules. #project-template... show more18 Comments
2 Stars
USB-C to 4 USB-A Hub V1
Introducing my USB-C to 4 USB-A Hub V1, a compact and efficient solution for expanding your device's connectivity. Easily connect multiple USB-A peripherals to a single USB-C port. The USB-C and USB-A high speed differential pairs were done with the help of Flux Automated Impedance Control. #USBCHub #Connectivity #project... show more98 Comments
2 Stars
BQ25895 Reference Design
This project is a reference design based on the BQ25895, a single cell Li-Ion battery charger. It manages the power between an external power source (VIN), a Li-Ion battery (BAT), and a system power rail (SYS). Key features include power-path management, battery thermistor monitoring, and charge status indication. #project #BQ25895 #ReferenceDesign #charger #BatteryManagemen #referenceDesign #bms #texas-instruments #template #reference-design #polygon... show more14 Comments
2 Stars
nRF52840 Development Board
The nRF52840 DK is a versatile single board development kit for Bluetooth 5, Bluetooth mesh, Thread, Zigbee, 802.15.4, ANT and 2.4 GHz proprietary applications on the nRF52840 SoC. It also supports development for the nRF52811 SoC.... show more1 Comment
2 Stars
Copilot v4 DogFooding - Audio Amplifier
I'm building an audio amplifier. These are the project requirements: - Type of Amplifier: Class D (for energy efficiency). - Input Source: Line-level input from a standard audio source, e.g., mobile phone or PC. - Output Power: 10W per channel (for a stereo setup). - Number of Channels: 2 (stereo output). - Distortion: Total Harmonic Distortion (THD) of less than 0.1% at full power. - Frequency Response: 20Hz to 20kHz. - Power Supply: Operate from a single 12V DC source. - Protection: Over-current and thermal protection for the amplifier IC. - Connectivity: Standard 3.5mm audio jack for input and screw terminals for speaker outputs. - Volume Control: A physical potentiometer for volume control. - Indicator: An LED indicator that shows power ON status. - Size Constraints: PCB size should not exceed 100mm x 100mm. Consider every requirement individually when answering any question... show more2 Stars
Single Blush Transporter
Welcome to your new project. Imagine what you can build here.18 Comments
1 Star
Arduino Uno R3 Shield Max485 single
Template for Arduino Uno R3 Shield. Include an official pinout so you will always know Arduino names, the alternative roles of pins, which one is SDA, or SCL, etc. On PCB you can find the 3D model of the Arduino Uno R3 itself along with the board outline on the silkscreen. #Arduino #Uno #Shield #Template #project-template #project... show more1 Star
Single Lead Heart Rate Monitor - AD8232
Use this template if you're planning to get your 1 to 2-layer board manufactured in JLCPCB. It has the via min/max and trace width constraints already baked as global rules. #project-template... show more1 Star
Single Lead Heart Rate Monitor - AD8232 j2Zz
Use this template if you're planning to get your 1 to 2-layer board manufactured in JLCPCB. It has the via min/max and trace width constraints already baked as global rules. #project-template... show more1 Star
Arduino Uno R3 Shield Max485 single
Template for Arduino Uno R3 Shield. Include an official pinout so you will always know Arduino names, the alternative roles of pins, which one is SDA, or SCL, etc. On PCB you can find the 3D model of the Arduino Uno R3 itself along with the board outline on the silkscreen. #Arduino #Uno #Shield #Template #project-template #project... show more1 Star
STM32MP1 Linux Card
This project designs a Linux Single Board Computer using STM32MP157FAC1, featuring DDR memory, a power management IC, USB and SD card interfaces, and essential user controls, aimed at versatile embedded applications.... show more3 Comments
1 Star
TP4056_Module
The TP4056 1A Li-ion Lithium Battery Charging Module with Current Protection – Mini USB is a compact device designed to charge individual lithium ion (Li-Ion) cells that lack their own protective circuit, such as 16550s, with a single cell capacity of 3.7V and 1 Ah or higher. This battery charging module employs the TP4056 charger IC and DW01 battery protection IC to provide a charge current of 1A, which will cease upon completion of the charging process. https://robocraze.com/products/tp4056-lithium-battery-charging-board #PCB #TP4056 #battery... show more1 Comment
1 Star
push-on-hold-off
A power switch using a push button. It turns on with a single press and only turns off when you hold the button down. This could be used to get functionality similar to most laptops where a single press when on will initiate a "soft" shutdown but you can force a "hard" shutdown by holding it down.... show more1 Comment
1 Star
Voice Controlled Toy Car
Voice Controlled Toy Car powered by the PocketBeagle single board computer and featuring two L293D motor drivers and two SPH0645LM4H-B MEMS microphones, this innovative project allows you to control your toy car's movements with just your voice. Perfect for hobbyists and DIY enthusiasts alike, this project is a must-have for anyone looking to take their electronic skills to the next level. #project #motorControllers... show more1 Comment
1 Star
RetroZ SBC S80
A minimalist single board Z80 retro computer based on the S80 design specifications. This board is developped using the S80 physical specifications. The specifications are not currently available online but I plan to fix that in a future revision.... show more1 Comment
1 Star
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We are happy to report that there is no minimum purchase requirement for using our Temu UK coupon code [ACW867474]. Whether you are buying a single small item or a large haul, you can apply the code to see what specific discounts and free shipping perks are available for your cart. Does this coupon work in the UK and Europe? Yes, it certainly does! We have confirmed that this coupon code is valid in 68 countries, which includes the UK, USA, Canada, and major European nations like Germany, France, and Italy. Shoppers in these regions can enjoy the same £100 benefits and free shipping options as everyone else. How do I know if the coupon was applied correctly? Once you enter [ACW867474] in the coupon field at checkout and click "Apply," you should see a confirmation message. The total price of your order will be updated to reflect the discount, and any free shipping or free gift bonuses will be listed in your order summary before you pay.... show more1 Star
MPXV7002DP
Through Hole straight pin header, 01x03, 2.54mm pitch, single row #connector #pinheader #tht... show more1 Star
Realistic Brown Battle Mech
Nice — you can do a clean pulse + latch using a single quad Schmitt-NAND chip: 74HC132 (or 74LVC132 for 3.3 V systems). The HC132 contains four 2-input NAND gates with Schmitt inputs so you can both clean a noisy SYN480R DATA line and build an SR latch (NAND SR is active-LOW) inside one package. Only a few passives and a driver transistor are needed. Below is a ready-to-build recipe (parts, wiring, explanation, tuning tips, and an ASCII schematic) — no extra logic ICs required. Parts (per latch) 1 × 74HC132 (quad 2-input NAND with Schmitt inputs). If your system is 3.3 V use 74LVC132 / 74HC132 rated for 3.3 V. Rin = 47 kΩ (input series) Cfilter = 10 nF (input RC to ground) — tweak for debounce/clean time Rpulldown = 100 kΩ (pull-down at input node, optional) Rpullup = 100 kΩ (pull-up for active-LOW R input so reset is idle HIGH) Rbase = 10 kΩ, Q = 2N2222 (NPN) or small N-MOSFET (2N7002) to drive your load Diode for relay flyback (1N4001) if you drive a coil Optional small cap 0.1 µF decoupling at VCC of IC Concept / how it works (short) Use Gate1 (G1) of 74HC132 as a Schmitt inverter by tying its two inputs together and feeding a small RC filter from SYN480R.DATA. This removes HF noise and provides a clean logic transition. Because it's a NAND with tied inputs its function becomes an inverter with Schmitt behavior. Use G2 & G3 as the cross-coupled NAND pair forming an SR latch (active-LOW inputs S̄ and R̄). A low on S̄ sets Q = HIGH. A low on R̄ resets Q = LOW. Wire the cleaned/inverted output of G1 to S̄. A valid received pulse (DATA high) produces a clean LOW on S̄ (because G1 inverts), setting the latch reliably even if the pulse is brief. R̄ is your reset input (pushbutton, HT12D VT, MCU line, etc.) — idle pulled HIGH. Q drives an NPN/MOSFET to switch your load (relay, LED, etc.). Recommended wiring (pin mapping, assume one chip; use datasheet pin numbers) I’ll refer to the 4 gates as G1, G2, G3, G4. Use G4 optionally for additional conditioning or to build a toggler later. SYN480R.DATA --- Rin (47k) ---+--- Node A ---||--- Cfilter (10nF) --- GND | Rpulldown (100k) --- GND (optional, keeps node low) Node A -> both inputs of G1 (tie inputs A and B of Gate1 together) G1 output -> S̄ (S_bar) (input1 of Gate2) Gate2 (G2): inputs = S̄ and Q̄ -> output = Q Gate3 (G3): inputs = R̄ and Q -> output = Q̄ R̄ --- Rpullup (100k) --- VCC (reset is idle HIGH; pull low to reset) (optional) R̄ can be wired to a reset pushbutton to GND or to an MCU pin Q -> Rbase (10k) -> base of 2N2222 (emitter GND; collector to one side of relay coil) Other side of relay coil -> +V (appropriate coil voltage) Diode across coil If you prefer MOSFET low side switching: Q -> gate resistor 100Ω -> gate of 2N7002 2N7002 source -> GND ; drain -> relay coil low side... show more1 Star